多捕问题

Question

我从一个不同的类中复制了一些东西，但是它给了我一个错误，即使它不是在原来的。下面是代码：

package com.dinobuilding;

import java.awt.EventQueue;
import java.awt.FontFormatException;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.ImageObserver;
import java.io.IOException;

import javax.swing.*;

public class Window {

public static int screenHeight = Toolkit.getDefaultToolkit().getScreenSize().height;
public static int screenWidth = Toolkit.getDefaultToolkit().getScreenSize().width;

public static ImageIcon background = new ImageIcon("resources/images/Background.png");

public static ImageObserver observer;

public Window() {
    EventQueue.invokeLater(new Runnable() {
        @Override
        public void run() {
            JFrame frame = new JFrame("DinoBuilding");

            try {
                UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
            } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                ex.printStackTrace();
            }

            frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
            frame.setResizable(false);
            frame.pack();
            frame.setSize(screenWidth, screenHeight);
            frame.setVisible(true);
        }
    });
}

public static void main(String[] args) {
    new Window();
}

}

我可能搞砸了一些非常琐碎的事情，但它不会停止告诉我“在这个语言级别上不支持多个捕获”。如果你需要更多我可能忘了提到的信息，就问吧。提前感谢！

Answer 1

像catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex)这样的多捕获仅支持Java7和更高版本。我相信您的JDK/Java编译器早于JDK1.7。http://docs.oracle.com/javase/7/docs/technotes/guides/language/catch-multiple.html

请检查一下。如果可能的话，升级到JDK1.7。否则使用catch块如下..。

try {
  // Do something
} catch (ClassNotFoundException ex) {
  // Do something
} catch(InstantiationException ex) {
 // Do something
} catch(IllegalAccessException ex) {
 // Do something
} catch(UnsupportedLookAndFeelException ex) {
 // Do something
} 

干杯!